The Automatic Gate Lock provides peace of mind and added security for your gate. The Automatic Lock (FM143) unlocks and locks automatically as the gate is activated to open and close. The FM143 is wired directly to the gate opener's control box, and it is activated by any one of the many Mighty Mule Access Controls, including the Entry Transmitter(FM135), the Gate Opening Sensor (FM138), the Digital Keypad (FM137), or the Push Button Control (FM132). The FM143 provides maximum stability and security on Mighty Mule gate openers, and is highly recommended for high wind areas, and gates over 8 Ft. long. It comes with two keys for manual release of the gate lock.

I do not know why I did not order this lock when I ordered my gate. My German S. dog learne4d how to open the gate when it was only open an inch or so. Now, I do not believe he could do so with a crow bar to do the same. Thanks Mighty Mule.